Embracing the need for changes at NATO, McCain told the audience there’s a need for a “new NATO” to address “new challenges.” That includes Montenegro becoming the alliance’s next member in McCain’s view.

NATO reform is different from marginalising the alliance, the Senator said.

In speaking about the citizens of NATO allies who died on the battlefield in recent years, he added: “I’m not sure how you put a price tag on that but it’s quite a contribution if you ask their mothers.”